/*
 * Copyright 2013-2018 Lilinfeng.
 *  
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.onecloud.cobbler.server;


import com.onecloud.cobbler.common.struct.Header;
import com.onecloud.cobbler.common.struct.MessageType;
import com.onecloud.cobbler.common.struct.NettyMessage;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;


public class HeartBeatRespHandler extends ChannelInboundHandlerAdapter {

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        NettyMessage message = (NettyMessage) msg;
        // 返回心跳应答消息
        if (message.getHeader() != null && message.getHeader().getType() == MessageType.HEARTBEAT_REQ.value()) {
            System.out.println("Receive client heart beat message : <--- " + message);
            NettyMessage heartBeat = buildHeatBeat();
            System.out.println("Send heart beat response message to client : ---> " + heartBeat);
            ctx.writeAndFlush(heartBeat);
        } else {
            ctx.fireChannelRead(msg);
        }
    }


    private NettyMessage buildHeatBeat() {
        NettyMessage message = new NettyMessage();
        Header header = new Header();
        header.setType(MessageType.HEARTBEAT_RESP.value());
        message.setHeader(header);
        return message;
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.fireExceptionCaught(cause);
        Channel channel = ctx.channel();
        if (channel.isActive()) {
            ctx.close();
        }
    }

}
